Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 2 - Section 2.6 - Percent and Mixture Problem Solving - Exercise Set - Page 160: 25

Answer

7 lbs

Work Step by Step

We have 14 lbs of 4 dollars/lb coffee, and want to add 7 dollars/lb coffee until the value adds up to 5 dollars/lb. 7x + 4(14) = 5(x + 14) Simplify: 7x + 4(14) = 5x + 5(14) 7x + 56 = 5x + 70 2x + 56 = 70 2x = 14 x = 7
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